Pulmonary edema that isn't caused by increased pressures in your heart is called noncardiogenic pulmonary edema. In this condition, fluid may leak from the capillaries in your lungs' air sacs because the capillaries themselves become more permeable or leaky, even without the buildup of back pressure from your heart.
So in other words, ambulatory medical care is a term for almost all of the medical appointments and treatments people receive regularly.
An ambulatory surgery center and a specialty hospital often provide similar facilities and support similar types of procedures. The specialty hospital may provide the same procedures or slightly more complex ones and the specialty hospital will often allow an overnight stay.